The Holy Trinity label has always done more work for two brands than three. As shorthand for high end brands it's a fun title: Patek Philippe, Audemars Piguet, Vacheron Constantin, the apex of Swiss watchmaking, producing quality watches backed by unparalleled history. The problem is that shorthand flattens what it describes. Patek gets the complicated-watch halo and the Nautilus. AP gets the Royal Oak and forty years of sports-watch cultural gravity. Vacheron gets third billing, a polite nod to Geneva's old guard, and a secondary market that has priced it accordingly. But is that price gap deserved, or is Vacheron poised for a comeback?